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LT1364 Datasheet(PDF) 9 Page - Linear Technology |
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LT1364 Datasheet(HTML) 9 Page - Linear Technology |
9 / 12 page 9 LT1364/LT1365 Small-Signal Transient (AV = 1) TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient (AV = –1) Small-Signal Transient (AV = –1, CL = 200pF) 1364/1365 TA31 1364/1365 TA32 1364/1365 TA33 Large-Signal Transient (AV = 1, CL = 10,000pF) Large-Signal Transient (AV = –1) Large-Signal Transient (AV = 1) 1364/1365 TA36 1364/1365 TA34 1364/1365 TA35 APPLICATIONS INFORMATION Layout and Passive Components The LT1364/LT1365 amplifiers are easy to use and toler- ant of less than ideal layouts. For maximum performance (for example, fast 0.01% settling) use a ground plane, short lead lengths, and RF-quality bypass capacitors (0.01 µF to 0.1µF). For high drive current applications use low ESR bypass capacitors (1 µF to 10µF tantalum). The parallel combination of the feedback resistor and gain setting resistor on the inverting input combine with the input capacitance to form a pole which can cause peaking or oscillations. If feedback resistors greater than 5k Ω are used, a parallel capacitor of value CF > RG x CIN/RF should be used to cancel the input pole and optimize dynamic performance. For unity-gain applications where a large feedback resistor is used, CF should be greater than or equal to CIN. Input Considerations Each of the LT1364/LT1365 inputs is the base of an NPN and a PNP transistor whose base currents are of opposite polarity and provide first-order bias current cancellation. Because of variation in the matching of NPN and PNP beta, the polarity of the input bias current can be positive or negative. The offset current does not depend on NPN/PNP beta matching and is well controlled. The use of balanced source resistance at each input is recommended for applications where DC accuracy must be maximized. The inputs can withstand transient differential input volt- ages up to 10V without damage and need no clamping or source resistance for protection. Differential inputs, how- ever, generate large supply currents (tens of mA) as required for high slew rates. If the device is used with sustained differential inputs, the average supply current will increase, excessive power dissipation will result and the part may be damaged. The part should not be used as |
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